<template>
  <div class="home">
    <el-container class="home-container">
      <!-- 头部区域 -->
      <el-header>
        <div>
          <img src="../assets/logo.png" alt="" /> <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="loginOut">退出</el-button>
      </el-header>
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单区域  开启路由模式-->
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409eff"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath"
          >
            <!-- 一级菜单 -->
            <!-- 这里推荐使用item循环项的id -->
            <!-- 这里的index只接受字符串 因此在后面拼接空字符串 -->
            <el-submenu
              :index="item.path + ''"
              v-for="item in menuList"
              :key="item.id"
            >
              <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{ item.authName }}</span>
              </template>
              <!-- 二级菜单 -->
              <!-- 为path加上/来组成路由链接 -->
              <el-menu-item
                :index="'/' + subItem.path"
                text-color="#fff"
                v-for="subItem in item.children"
                :key="subItem.id"
                @click="saveNavState('/' + subItem.path)"
              >
                <!-- 二级菜单的模板区域 -->
                <template slot="title">
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{ subItem.authName }}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 内容区域 -->
        <el-main><router-view></router-view></el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  name: "MyHome",
  data() {
    return {
      menuList: [],
      iconsObj: {
        125: "iconfont icon-user",
        103: "iconfont icon-lifangti",
        101: "iconfont icon-wenjiandai",
        102: "iconfont icon-dingdan",
        145: "iconfont icon-shujuzhongxinshujucangku",
      },
      // 是否折叠
      isCollapse: false,
      //被激活的链接地址
      activePath: "",
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },

  methods: {
    //登出按钮函数
    loginOut() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取左侧边栏的请求
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    // 切换菜单的展开和收纳
    toggleCollapse() {
      // 知识点 可以取反后再赋值给当前属性 以实现状态切换
      this.isCollapse = !this.isCollapse;
    },
    // 保存激活的链接状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="less" scoped>
img {
  width: 50px;
}
.home {
  height: 100%;
}
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 0;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
